#app {
  color: #bfc;
}

#app #contains {
  width: 100px;
  height: 200px;
  border: 1px solid #000;
}

#app #contains::after {
  content: '';
  display: table;
  clear: both;
}

#app a {
  color: #bfc;
}

#app a:hover {
  color: red;
}
